TY  - RPRT
TI  - Externally hexed implants, abutments, and transfer devices: a comprehensive overview.
AU  - C E English
PY  - 1992
DO  - 10.1097/00008505-199200140-00009
UR  - https://pubmed.ncbi.nlm.nih.gov/1298502/
ID  - 1298502
ER  -